Various embodiments of the teachings herein include a mixer disposed in a fuel gas combustion system and mixing air and fuel gas to form flammable mixed gases. The mixer may include: a Venturi tube having an air inlet, a fuel gas inlet, a gas mixture outlet, a central axis direction, and a throat positioned between the air inlet and the gas mixture outlet in the central axis direction, wherein the fuel gas inlet is disposed at the throat; and an adjustment component disposed in the Venturi tube downstream of the throat, the adjustment component drivable to move towards or away from the throat in the central axis direction, thereby changing a flow area of gas in the Venturi tube. The adjustment component comprises a conical valve plug with a conical outer surface thereof at a side facing towards the throat and fitting an inner surface of the Venturi tube.

A flammable gas diluter includes a dilution vessel having an outer envelope defining a longitudinal flow passage from an inlet to an outlet; at least one air inlet assembly for directing a flow of air into the inlet of the dilution vessel; a flammable gas inlet arrangement located towards an inlet end of the dilution vessel; two gas flow generators configured to pump a flow of air into the air inlet assembly, the two gas flow generators being located upstream of the flammable gas inlet arrangement; and two dampers, each of the dampers being mounted between a corresponding gas flow generator and the dilution vessel. Control circuitry is configured to open a damper during an operational mode of the corresponding gas flow generator and to close the damper when the corresponding gas flow generator is stopped in standby mode.

Gas injectors for providing uniform flow of fluid are provided herein. The gas injector includes a plenum body. The plenum body includes a recess, a protrusion adjacent to the recess and extending laterally away from the plenum body, and a plurality of nozzles extending laterally from an exterior surface of the plenum body. The plenum body has a plurality of holes in an exterior wall of the plenum body. Each nozzle is in fluid communication with an interior volume of the plenum body. By directing the flow of fluid, the gas injector provides for a uniform deposition.

An exemplary process air recirculation system, and an electric heater mixing apparatus is disclosed herein. Exemplary process air recirculation systems comprise the electric heating mixing apparatus. An exemplary electric heating mixing apparatus comprises: walls defining a first chamber having a first upstream opening and a first downstream opening, and a second chamber having a first upstream opening and a first downstream opening, wherein the second chamber is adjacently disposed to the first chamber, a first inlet damper disposed at the first upstream opening, a second inlet damper disposed at the second upstream opening, and a resistance-type electric air heater disposed in the first chamber.

A system for mixing hydrogen gas and air includes a housing extending from a first end to a second end and defining a mixing chamber. The second end receives the air. A tubular mixer in the mixing chamber extends along a central axis from a first end to a second end. The mixer has an outer surface and an inner surface defining a central passage. The second end is closed by an end wall. The mixer has first fluid directing structure for directing the air and the hydrogen gas radially inward from the mixing chamber to the central passage to form a mixture. A distributor is secured to the first end of the housing and receives the mixture from the first end of the mixer. The distributor includes second fluid directing structure for directing the mixture radially outward to a burner.

A dilution gas mixing unit that is used in an exhaust gas analysis system that analyzes the mixed gas obtained by diluting an exhaust gas with the dilution gas, and mixes the dilution gas with the exhaust gas is provided with a dilution gas supply pipe that is connected to an exhaust gas introduction pipe into which the exhaust gas is introduced and supplies the dilution gas to the exhaust gas introduction pipe, a dilution gas sampling unit that is provided in the dilution gas supply pipe and collects the dilution gas, and a backflow prevention member that is provided closer to the exhaust gas introduction pipe than the dilution gas sampling unit in the dilution gas supply pipe and prevents the mixed gas from flowing backward through the dilution gas supply pipe.

A method comprises transporting a first stream of a carrier gas to a delivery device that contains a liquid precursor compound. The method further comprises transporting a second stream of the carrier gas to a point downstream of the delivery device. The first stream after emanating from the delivery device and the second stream are combined to form a third stream, such that the dew point of the vapor of the liquid precursor compound in the third stream is lower than the temperature of the plumbing that transports the vapor to a CVD reactor or a plurality of CVD reactors. The flow direction of the first stream, the flow direction of the second stream and the flow direction of the third stream are unidirectional and are not opposed to each other.

A mixing chamber is loaded with a first fluid. While a volume of the first fluid within the mixing chamber is constant, first and second streams of a second fluid are injected into the mixing chamber along first and second injection directions. As a result of injecting the first and second streams of the second fluid into the mixing chamber, the first and second streams of the second fluid impinge one another so as to generate within the mixing chamber at least one further stream of the second fluid that mixes with the first fluid and that flows in a direction different to the first and second injection directions.

A volatiles consuming eductor system for coated scrap metal furnaces with separate delacquering and melt chambers. Motive gas is forced through an inlet into a mixing chamber in a direction opposite a suction port, creating a Venturi that draws gases from the delaquering chamber through the mixing chamber. The motive gas and the drawn gases mix and are forced through a discharge port, ignited, and injected into the melt chamber to help heat the melt chamber. A computer monitors process conditions and controls a regulator that adjusts the motive gas flow in response to those conditions.

A beverage machine has a gas dissolution assembly that includes a pressure vessel having an open end and a top cap that couples with the open end of the pressure vessel. The top cap has a gas inlet through which a gas to be infused into the beverage flows. A clamping mechanism clamps the top cap onto the open end of the pressure vessel. A gas infusing device that is coupled to the gas inlet has a porous element that infuses the gas into the beverage.